Wave packet dynamics of potassium dimers attached to helium nanodroplets

Details Wave packet dynamics of potassium dimers attached to helium nanodroplets Wave packet dynamics of potassium dimers attached to helium nanodroplets

2006-04-18

arxiv.org/abs/physics/0604143v1

Physics

Atomic and Molecular Clusters

Scientific paper

10.1088/0953-4075/39/19/S23

The dynamics of vibrational wave packets excited in K$_2$ dimers attached to superfluid helium nanodroplets is investigated by means of femtosecond pump-probe spectroscopy. The employed resonant three-photon-ionization scheme is studied in a wide wavelength range and different pathways leading to K$^+_2$-formation are identified. While the wave packet dynamics of the electronic ground state is not influenced by the helium environment, perturbations of the electronically excited states are observed. The latter reveal a strong time dependence on the timescale 3-8 ps which directly reflects the dynamics of desorption of K$_2$ off the helium droplets.

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